JP2022090693A - Heat exchanger for use in geothermal power generation and geothermal power generation system using the same - Google Patents

Heat exchanger for use in geothermal power generation and geothermal power generation system using the same Download PDF

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JP2022090693A
JP2022090693A JP2020203143A JP2020203143A JP2022090693A JP 2022090693 A JP2022090693 A JP 2022090693A JP 2020203143 A JP2020203143 A JP 2020203143A JP 2020203143 A JP2020203143 A JP 2020203143A JP 2022090693 A JP2022090693 A JP 2022090693A
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徹 田渕
Toru Tabuchi
かづみ 眞嶋
Kazumi Majima
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Hybrid Energy Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract

To provide a geothermal power generation system which can increase a total power generation amount.SOLUTION: A geothermal power generation system employs a constitution which comprises: a casing pipe 2 embedded into the ground while being tightly closed at its outside with external peripheral cement; an inner pipe 3 arranged inside a part or the whole of a region being an upper-part geothermal low-temperature zone T in order to obtain a heat insulation layer 4 which takes in air between the casing pipe and itself; a water filling pipe 7 for filling a geothermal high-temperature zone N of a casing pipe depth part with water; a water takeout pipe 8 extending to a lower part lower than a water level being a boundary k between a gas 5 and liquid 6; a water gauge 13 for monitoring the water level P in the casing pipe; and an air blowing pipe 11 for pressurizing the gas in the casing pipe by a compressor 9, and pressure-sending the liquid. Also, the geothermal power generation system employs the constitution for maintaining the water level.SELECTED DRAWING: Figure 1

Description

本発明は、地熱発電に用いる熱交換器に関し、詳しくは、地熱エネルギーを高効率で取り出すことができる地熱交換器と、これを利用して得られる熱水を循環する循環水槽等を備えた地熱発電システムに関する。 The present invention relates to a heat exchanger used for geothermal power generation. Specifically, the present invention provides a geothermal heat exchanger capable of extracting geothermal energy with high efficiency, and a geothermal heat tank provided with a circulating water tank for circulating hot water obtained by using the geothermal heat exchanger. Regarding the power generation system.

地熱エネルギーを利用して発電する地熱発電は、高温のマグマ層を熱源とするものであり、半永久的な熱エネルギーとすることができるとともに、発電の過程において温室効果ガスを発生しないことから、化石燃料の代替手段として注目されている。 Geothermal power generation, which uses geothermal energy to generate electricity, uses a high-temperature magma layer as a heat source, can be used as semi-permanent thermal energy, and does not generate greenhouse gases in the process of power generation. It is attracting attention as an alternative to fuel.

従来の地熱発電では、地熱帯をボーリングし、地熱帯に存在する自然の蒸気や熱水を自然の圧力を利用して取り出し発電を行っている。そのため、取り出された蒸気と熱水には、地熱帯特有の硫黄その他の不純物が多量に含まれている。この不純物はスケールとなって、熱井戸や配管類、あるいはタービン等に付着する。スケールが付着すると、経年的に発電出力が減少し長期間の使用が困難となる。 In conventional geothermal power generation, the tropics are bored, and natural steam and hot water existing in the tropics are taken out using natural pressure to generate electricity. Therefore, the extracted steam and hot water contain a large amount of sulfur and other impurities peculiar to the tropics. These impurities become scales and adhere to hot wells, pipes, turbines, and the like. If the scale adheres, the power generation output will decrease over time, making it difficult to use for a long period of time.

このスケールによる問題を解決するために、地上から水を送り、エネルギーを採取する方式を採用した地熱交換器が、特許文献１、特許文献２に記載されている。また、地熱エネルギーを有効に取り出すことを目的として、地下においてフラッシュ率を向上させる手段を備えた地熱交換器に関する発明が、特許文献３に記載されている。 In order to solve the problem of this scale, a geothermal exchanger that adopts a method of sending water from the ground and collecting energy is described in Patent Document 1 and Patent Document 2. Further, Patent Document 3 describes an invention relating to a geothermal exchanger provided with a means for improving the flash rate underground for the purpose of effectively extracting geothermal energy.

特許第４９２７１３６号公報Japanese Patent No. 4927136 特許第５７３１０５１号公報Japanese Patent No. 5731051 特許第６１７６８９０号公報Japanese Patent No. 6176890

特許文献１、２、及び３において開示されたいずれの方式においても、地下に埋設された二重管式の地熱交換器を使用しており、これによって生じる共通する欠点は、全行程に水が充填され低温帯を含む地下を通過するため、地熱エネルギーがこの全行程の水に及んでしまい地上に到達するときには、多くの地熱エネルギーを失ってしまうというものである。また、地熱開発においては、全国に圧倒的に多く存在する、約１８０℃以下の中低温地熱帯を対象とした地熱発電システムの開発が重要であり、この中低温地帯を熱源として用いる場合には、地熱エネルギーの温度をできる限り有効にかつ安定して採取すると共にバイオマス等の再生可能エネルギーとの直接連携により発電総量を増大させることも課題となっている。 Both of the methods disclosed in Patent Documents 1, 2 and 3 use a double-tube geothermal exchanger buried underground, and the common drawback caused by this is that water is used in the entire process. Since it is filled and passes underground including the low temperature zone, when the geothermal energy reaches the ground, it loses a lot of geothermal energy. In addition, in geothermal development, it is important to develop a geothermal power generation system targeting the mid-low temperature tropical region of about 180 ° C or less, which is overwhelmingly present throughout the country. It is also an issue to collect the temperature of geothermal energy as effectively and stably as possible and to increase the total amount of power generation by direct cooperation with renewable energy such as biomass.

上記の課題を解決するために、本発明は、地中から熱エネルギーを取り出すための地熱交換器であって、外側を外周セメントで密閉して地中に埋設するケーシング管と、前記ケーシング管との間で空気を入れた断熱層を得るために上部の地熱低温帯となる領域の一部または全部の内側に設ける内管と、前記ケーシング管深部の地熱高温帯に注水する注水管と、気体と液体の境界となる水面より下方まで伸ばされた取水管と、前記ケーシング管内の水位を監視する水位計と、前記ケーシング管内の前記気体をコンプレッサーにより加圧するとともに、前記液体を圧送するための送風管とを備えて前記水位を維持する構成を採用した。 In order to solve the above problems, the present invention is a geothermal exchanger for extracting heat energy from the ground, and includes a casing pipe whose outside is sealed with outer peripheral cement and buried in the ground, and the casing pipe. An inner pipe provided inside a part or all of the region that becomes the upper geothermal low temperature zone in order to obtain a heat insulating layer with air in between, a water injection pipe that injects water into the geothermal high temperature zone at the deep part of the casing pipe, and a gas. An intake pipe extended below the water surface that is the boundary between the liquid and the liquid, a water level gauge that monitors the water level in the casing pipe, and a blower for pressurizing the gas in the casing pipe with a compressor and pumping the liquid. A configuration was adopted in which a pipe was provided to maintain the water level.

また、本発明は、前記取水管が、請求項１に記載の地熱交換器の深部地熱エネルギーを効率よく取水できるのに必要な内径を備えるとともに、該地熱交換器から第一循環水槽までの間の流路を絞ることによって流速を上げる構成を採用することもできる。 Further, in the present invention, the intake pipe has an inner diameter necessary for efficiently taking in the deep geothermal energy of the geothermal exchanger according to claim 1, and between the geothermal exchanger and the first circulating water tank. It is also possible to adopt a configuration in which the flow velocity is increased by narrowing the flow path.

また、本発明は、前記取水管により前記地熱高温帯から得た熱水の圧力と温度を安定させるために熱水を循環する装置を備えた前記熱交換器であって、前記熱交換器に、第一循環水槽と、第二循環水槽と、熱水加熱器と、第一ポンプを備え、前記第一循環水槽は、半地下に備えられるとともに蒸発を押さえるために加圧する圧力装置を有し、前記第二循環水槽、前記熱水加熱器、及び前記第一ポンプを経由して前記熱水を循環させる循環装置を備える構成を採用することもできる。 Further, the present invention is the heat exchanger provided with a device for circulating hot water in order to stabilize the pressure and temperature of hot water obtained from the geothermal high temperature zone by the intake pipe. The first circulating water tank is provided with a first circulating water tank, a second circulating water tank, a hot water heater, and a first pump, and the first circulating water tank is provided semi-underground and has a pressure device that pressurizes to suppress evaporation. , The configuration including the second circulating water tank, the hot water heater, and the circulation device for circulating the hot water via the first pump can also be adopted.

また、本発明は、タービン出口の蒸気を復水器で復水とし、増圧器、前記第二循環水槽、熱水加熱器で加熱後、一部の復水は前記第１ポンプを経由し前記地熱交換器に戻すことで、地下の地熱高温帯領域を冷やすことが少なく熱交換の高効率を維持でき、さらに実用期間を長く保つことができる構成を含む前記地熱交換器を利用した発電システムとすることもできる。 Further, in the present invention, the steam at the turbine outlet is condensed by a condenser, heated by a pressure booster, the second circulating water tank, and a hot water heater, and then a part of the condensate passes through the first pump. By returning to the geothermal exchanger, the power generation system using the geothermal exchanger including the configuration that can maintain the high efficiency of heat exchange without cooling the underground geothermal high temperature zone area and maintain the practical period for a long time. You can also do it.

また、本発明は、前記発電システムにおいて、他の余剰熱供給施設と直接連携して稼働することを含む構成を採用することもできる。 Further, the present invention can also adopt a configuration including operating in direct cooperation with other surplus heat supply facilities in the power generation system.

また、本発明は、前記地熱交換器を利用した発電のためのシステムにおいて、他の発電装置からの余剰電力を組み合わせることを含む構成を採用することもできる。 Further, the present invention can also adopt a configuration including a combination of surplus electric power from another power generation device in the system for power generation using the geothermal exchanger.

本発明によれば、約１８０℃以下の中低温の地熱帯において、効率良く熱交換を行うことができ、地熱開発の対象となる場所の数を増やして、地熱エネルギー採取量を増やすことが可能になる。さらに、バイオマス等の再生可能エネルギーと直接連携することにより総発電量を増大する地熱発電システムの効果は大きい。本発明は、従来の地熱発電から見ると今までに考えられない程の膨大な出力増大が望め、バイオマス発電側から見ても単独の発電に比べバイオマス燃料の乾燥や発電過程での地熱エネルギーの基礎熱利用等を得ることで熱効率が向上し全体としてＣｏ２の削減に寄与できるという優れた効果を発揮するものである。 According to the present invention, heat exchange can be efficiently performed in the mid-low temperature geotropic of about 180 ° C. or less, the number of places targeted for geothermal development can be increased, and the amount of geothermal energy collected can be increased. become. Furthermore, the geothermal power generation system, which increases the total amount of power generation by directly linking with renewable energy such as biomass, has a great effect. According to the present invention, an enormous increase in output can be expected from the viewpoint of conventional geothermal power generation, and even from the viewpoint of biomass power generation, the drying of biomass fuel and the geothermal energy in the power generation process can be compared with the case of single power generation. By obtaining the utilization of basic heat or the like, the thermal efficiency is improved and it is possible to contribute to the reduction of Co2 as a whole, which is an excellent effect.

また、本発明に係る熱交換器によれば、ケーシング管と内管の間の断熱層で遮熱され、さらに熱伝導率の低い気体中を通過することで、熱水の温度低下が抑えられるという従来の熱交換器にはない優れた効果を発揮するものである。 Further, according to the heat exchanger according to the present invention, the heat is shielded by the heat insulating layer between the casing pipe and the inner pipe, and the heat is passed through the gas having a low thermal conductivity, so that the temperature drop of the hot water can be suppressed. This is an excellent effect not found in conventional heat exchangers.

また、本発明に係る熱交換器を利用した発電システムによれば、約１８０℃以下の中低温地熱帯を用いても、効率良く熱交換を行うことができ、さらにバイオマス等の再生可能エネルギーとの直接連携で総発電量を増大することにより、地熱開発の対象となる場所が格段に増え、地熱エネルギー採取量を増やすことが可能になるという優れた効果を発揮する。 Further, according to the power generation system using the heat exchanger according to the present invention, heat exchange can be efficiently performed even in the mid-low temperature geothermal region of about 180 ° C. or lower, and further, with renewable energy such as biomass. By increasing the total amount of power generation through direct cooperation with the above, the number of places targeted for geothermal development will increase dramatically, and it will be possible to increase the amount of geothermal energy extracted, which is an excellent effect.

また、本発明に係る熱交換器を利用した発電システムによれば、バイオマスの火力等により加熱された蒸気が発電装置で利用された後、復水器で復水となり、第二循環水槽、再生可能エネルギーの利用による熱水加熱器を経由し地熱交換器に戻されることで、地下の地熱高温体領域を冷やすことが少なく熱交換の高効率を維持でき、さらに実用期間を長く保つことができるという優れた効果を発揮するものである。 Further, according to the power generation system using the heat exchanger according to the present invention, after the steam heated by the thermal power of biomass is used in the power generation device, the water is restored by the condenser, and the second circulating water tank is regenerated. By returning to the geothermal exchanger via the hydrothermal condenser by utilizing the available energy, it is possible to maintain high efficiency of heat exchange without cooling the geothermal high temperature body region under the ground, and to maintain the practical period for a long time. It exerts an excellent effect.

また、本発明に係る熱交換器を利用した発電システムによれば、地熱交換器により採取された熱水や蒸気は、バイオマス火力等の再生可能エネルギーにより加熱された後、蒸気タービンや熱交換器等で利用される直前に熱水・蒸気調整器で圧力と温度の最終調整を行う構成を採用することにより、発電装置へ供給する熱水や蒸気の圧力及び温度の安定化を図ることが可能となるという優れた効果を発揮するものである。 Further, according to the power generation system using the heat exchanger according to the present invention, the hot water and steam collected by the geothermal exchanger are heated by renewable energy such as biomass-fired power, and then the steam turbine and the heat exchanger. It is possible to stabilize the pressure and temperature of hot water and steam supplied to the power generation device by adopting a configuration in which the pressure and temperature are finally adjusted with a hot water / steam regulator immediately before being used in such cases. It exerts an excellent effect of becoming.

本発明に係る地熱交換器を利用した発電システム例の全体構成を示す実施例説明図である。It is an Example explanatory diagram which shows the whole structure of the power generation system example which used the geothermal exchanger which concerns on this invention. 本発明に係る地熱交換器の基本的な構成を示す基本構成説明図である。It is a basic structure explanatory drawing which shows the basic structure of the geothermal exchanger which concerns on this invention. 従来の地熱発電に用いられている地熱生産井及び地熱交換器と本発明に係る地熱交換器との比較を示す比較説明図である。It is a comparative explanatory diagram which shows the comparison between the geothermal production well and the geothermal exchanger used for the conventional geothermal power generation, and the geothermal exchanger which concerns on this invention. 本発明に係る地熱交換器を利用した発電システムの概要を示す概要説明模式図である。It is a schematic explanatory diagram which shows the outline of the power generation system using the geothermal exchanger which concerns on this invention.

以下に、本発明に係る地熱交換器の基本構成について図面に基づいて説明する。図１は、本発明に係る地熱交換器を用いた発電システム全体の構成を示す実施例説明図であり、図２は、本発明に係る地熱交換器の基本的な構成を示す基本構成説明図である。但し、発電システム全体はあくまでも実施例であって、これらの構成に限定されるものではなく、技術的思想の創作として本発明と同様の効果が得られる範囲内において変更可能である。 Hereinafter, the basic configuration of the geothermal exchanger according to the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram of an example showing the configuration of the entire power generation system using the geothermal exchanger according to the present invention, and FIG. 2 is a basic configuration explanatory diagram showing the basic configuration of the geothermal exchanger according to the present invention. Is. However, the entire power generation system is merely an example, and is not limited to these configurations, and can be changed as long as the same effect as that of the present invention can be obtained as a creation of a technical idea.

本発明に係る地熱交換器１は、ケーシング管２、内管３、断熱層４、気体５、液体６等の配置により地下深部の熱エネルギーを効率よく地上に採取する地熱交換器である。具体的には、地中に設けられる閉鎖された前記ケーシング管２の外周を前記外周セメント１２で密閉し、前記地熱交換器１の上部地熱低温帯には、前記ケーシング管２の内側に内管３を設け前記ケーシング管２との間に空気を入れ断熱層４とする。前記内管３（一部前記ケーシング管２）の内側には、深部の地熱高温帯Ｎの領域にのみ予め水処理装置１４で処理された液体６が満たされ、その水面から上部はコンプレッサー９と圧力計１０で制御された気体５を充満させ、液体６の蒸発を抑える。また、前記内管３（一部前記ケーシング管２）の内側にほぼ管底まで伸ばされた注水管７と、水面よりやや下方まで伸ばされた取水管８、および前記気体５の圧力を調整できるコンプレッサー９からの送風菅１１を配置し、水位を監視できる水位計１３と併せて地熱交換器１内の液体６の量を制御するものである。なお、前記取水管８により高温地熱帯から熱を得て熱水Ｈとなった液体６は半地下に備えられた第一循環水槽１７に送られ圧力装置１８で蒸発が抑えられ第二循環水槽２５、熱水加熱器１５、第一ポンプ１６を経由し地熱交換機１との間で循環する構成の循環装置と組み合わされることが好適である。 The geothermal exchanger 1 according to the present invention is a geothermal exchanger that efficiently collects heat energy in the deep underground by arranging a casing pipe 2, an inner pipe 3, a heat insulating layer 4, a gas 5, a liquid 6, and the like. Specifically, the outer periphery of the closed casing pipe 2 provided in the ground is sealed with the outer peripheral cement 12, and in the upper geothermal low temperature zone of the geothermal exchanger 1, an inner pipe is inside the casing pipe 2. 3 is provided and air is introduced between the casing pipe 2 and the casing pipe 2 to form a heat insulating layer 4. The inside of the inner pipe 3 (partly the casing pipe 2) is filled with the liquid 6 previously treated by the water treatment device 14 only in the deep geothermal high temperature zone N, and the compressor 9 is above the water surface. The gas 5 controlled by the pressure gauge 10 is filled to suppress the evaporation of the liquid 6. Further, the pressures of the water injection pipe 7 extending to the inside of the inner pipe 3 (partly the casing pipe 2), the intake pipe 8 extending slightly below the water surface, and the gas 5 can be adjusted. The blower pipe 11 from the compressor 9 is arranged, and the amount of the liquid 6 in the geothermal exchanger 1 is controlled together with the water level gauge 13 capable of monitoring the water level. The liquid 6 which has become hot water H by obtaining heat from the high temperature tropical region by the intake pipe 8 is sent to the first circulating water tank 17 provided in the semi-underground, and the evaporation is suppressed by the pressure device 18 to suppress the evaporation in the second circulating water tank. 25, It is preferable to combine with a circulation device having a configuration that circulates with the geothermal exchanger 1 via the hot water heater 15 and the first pump 16.

ケーシング管２は、掘削した穴に挿入し、接続部を介して内部が密閉されるように連結される管材である。 The casing pipe 2 is a pipe material that is inserted into a drilled hole and connected so as to be sealed inside via a connecting portion.

内管３は、前記ケーシング管２との間に空気を入れて断熱層４とするために上部の地熱低温帯Ｔの領域において前記ケーシング管２の内側に設けるものであり、係る断熱層４が地表に近い低温帯に配置されることで、深部で熱せられた熱水Ｈが冷却されにくくするものである。 The inner pipe 3 is provided inside the casing pipe 2 in the region of the upper geothermal low temperature zone T in order to allow air to enter between the casing pipe 2 and form the heat insulating layer 4, and the heat insulating layer 4 is provided. By arranging it in a low temperature zone close to the ground surface, it is difficult for the hot water H heated in the deep part to be cooled.

断熱層４は、前記ケーシング管２の内側に内管３を配置することで得られる空気の層である。係る断熱層４が地表に近い低温帯に配置されることで、深部で熱せられた熱水Ｈが冷却されないよう断熱するものである。 The heat insulating layer 4 is a layer of air obtained by arranging the inner pipe 3 inside the casing pipe 2. By arranging the heat insulating layer 4 in a low temperature zone close to the ground surface, the hot water H heated in the deep part is heat-insulated so as not to be cooled.

気体５は、物質の状態のひとつであり、一定の形と体積を持たず、自由に流動し圧力の増減で体積が容易に変化する状態のことである。また、気体５とは、地球の大気圏の最下層を構成している気体で、人類が暮らしている中で身の回りにあるものをいう。一般に、無色透明で複数の気体の混合物からなり、その組成は約８割が窒素、約２割が酸素でほぼ一定である。なお、気体５はコンプレッサーにより加圧されて体積を縮小させた空気となる。 The gas 5 is one of the states of matter, which does not have a constant shape and volume, flows freely, and the volume easily changes by increasing or decreasing the pressure. Further, the gas 5 is a gas constituting the lowest layer of the earth's atmosphere, and refers to a gas around us in the living of human beings. Generally, it is colorless and transparent and consists of a mixture of a plurality of gases, and its composition is almost constant with about 80% nitrogen and about 20% oxygen. The gas 5 is pressurized by a compressor to become air whose volume has been reduced.

液体６は、スケール等の発生を回避すべく純水を用いる。例えば、一般的な水道水の中に存在する不純物として塩類、残留塩素、溶解性でない微粒子、有機物、電解しないガスなどがあるが、純水は、これらのうち主に塩類や残留塩素がほとんどすべて除去された状態の水であり、水道水レベルの水を単にフィルターなどでろ過、または活性炭を通しただけの水は、液体６には含まれないものである。 As the liquid 6, pure water is used in order to avoid the generation of scale and the like. For example, impurities existing in general tap water include salts, residual chlorine, insoluble fine particles, organic substances, and non-electrolyzed gas, but pure water mainly contains salts and residual chlorine. The water in the removed state, in which tap water level water is simply filtered with a filter or the like or passed through activated charcoal, is not contained in the liquid 6.

注水管７は、前記地熱交換器１の内部の管底近くまで挿入され、液体６をケーシング２内へ注入するための管である。 The water injection pipe 7 is a pipe that is inserted close to the bottom of the inside of the geothermal exchanger 1 to inject the liquid 6 into the casing 2.

取水管８は、地熱によって熱せられた熱水Ｈを取り出すための管で、気体５と液体６の境界水面よりやや下側に先端が位置することが望ましい。 The intake pipe 8 is a pipe for taking out hot water H heated by geothermal heat, and it is desirable that the tip is located slightly below the boundary water surface between the gas 5 and the liquid 6.

コンプレッサー９は、所謂空気圧縮機であって、熱水Ｈが沸騰により気化しないように地熱交換器１内を加圧し、併せて圧力により取水管８を通して地上に熱水Ｈを送り出す働きを兼ねる。地熱交換器１内の水面高による液体６の水量変化及び熱水温度の変化に対応した自動制御をすることが望ましい。なお、１８０度時の水の飽和蒸気圧は１．０ＭＰａにも達する。従って、この圧力と同等以上の圧力を水に対して加圧しなければキャビテーション（沸騰）を生じてしまう。そのため、係る加圧が可能な性能を備えるコンプレッサー９とする。 The compressor 9 is a so-called air compressor, and also has a function of pressurizing the inside of the geothermal exchanger 1 so that the hot water H does not vaporize due to boiling, and at the same time, sending the hot water H to the ground through the intake pipe 8 by the pressure. It is desirable to perform automatic control in response to changes in the amount of water in the liquid 6 and changes in the hot water temperature due to the height of the water surface in the geothermal exchanger 1. The saturated vapor pressure of water at 180 degrees reaches 1.0 MPa. Therefore, cavitation (boiling) will occur unless a pressure equal to or higher than this pressure is applied to water. Therefore, the compressor 9 has a performance capable of such pressurization.

圧力計１０は、前記地熱交換器１内の圧力を前記コンプレッサー９で圧縮した際の前記地熱交換器１内の圧力を連続して計測する装置である。 The pressure gauge 10 is a device that continuously measures the pressure in the geothermal exchanger 1 when the pressure in the geothermal exchanger 1 is compressed by the compressor 9.

送風管１１は、前記地熱交換器１内の気体５の領域内にコンプレッサーにより加圧された空気を送るための管である。 The blower pipe 11 is a pipe for sending air pressurized by a compressor into the region of gas 5 in the geothermal exchanger 1.

外周セメント１２は、前記ケーシング管２の固定や地下層からの暴噴防止などを目的として掘削孔と前記ケーシング管２の隙間に充填するセメントである。 The outer peripheral cement 12 is cement that fills the gap between the excavation hole and the casing pipe 2 for the purpose of fixing the casing pipe 2 and preventing an outburst from the underground layer.

水位計１３は、前記地熱交換器１内の水位を連続して計測する装置である。図１では一点鎖線で地表面（ＧＬ）から地熱高温帯領域まで示しているが、実際には数千メートルに及ぶこともあるため、気体５と液体６の境界Ｋとなる水位Ｐを跨ぐ範囲のみとしてもよい。 The water level gauge 13 is a device that continuously measures the water level in the geothermal exchanger 1. In FIG. 1, a one-dot chain line is shown from the ground surface (GL) to the geothermal high temperature zone region, but since it may actually reach several thousand meters, the range straddling the water level P, which is the boundary K between the gas 5 and the liquid 6. May be only.

水位Ｐは、ケーシング管２内における液体６の水位であって、注水管８から注水される液体６と取水管８から取水される液体６により変動を示すもので、係る水位Ｐは水位計１３で監視し、コンプレッサー９と圧力計１０を介して所定の高さとなるように制御される。 The water level P is the water level of the liquid 6 in the casing pipe 2, and varies depending on the liquid 6 injected from the water injection pipe 8 and the liquid 6 taken from the intake pipe 8, and the water level P is the water level meter 13. It is monitored by and controlled to a predetermined height via the compressor 9 and the pressure gauge 10.

水処理装置１４は、前記地熱交換器１内に注水する水を純化する装置である。イオン交換樹脂を利用した生成方法などを採用したもの等を用い、水道水や地下水に含まれる多様な不純物を取り除く装置である。 The water treatment device 14 is a device that purifies the water injected into the geothermal exchanger 1. It is a device that removes various impurities contained in tap water and groundwater by using a method that uses an ion exchange resin or the like.

熱水加熱器１５は、前記地熱交換器１と地上の循環水槽との循環する熱水Ｈ及びバイオマス燃焼等の熱供給施設２０等で利用した後の再利用熱水Ｈを加熱する装置である。 The hot water heater 15 is a device for heating the hot water H circulated between the geothermal exchanger 1 and the circulating water tank on the ground and the recycled hot water H after being used in the heat supply facility 20 for biomass combustion or the like. ..

第一ポンプ１６は、前記水処理装置１４からの水及び循環する熱水Ｈを前記地熱交換器１に注水管７を通して注水させるポンプ装置である。 The first pump 16 is a pump device that injects water from the water treatment device 14 and circulating hot water H into the geothermal exchanger 1 through a water injection pipe 7.

第一循環水槽１７は、前記地熱交換器１からの熱水Ｈを一旦溜めてから前記地熱交換器１と循環し、且つバイオマス燃焼等の熱供給施設２０で利用する熱水Ｈを溜め、供給する水槽である。 The first circulating water tank 17 temporarily stores the hot water H from the geothermal exchanger 1 and then circulates with the geothermal exchanger 1 and stores and supplies the hot water H used in the heat supply facility 20 for biomass combustion or the like. It is a water tank.

圧力装置１８は、前記第一循環水槽１７内の熱水が気化しないよう圧力を加える装置である。 The pressure device 18 is a device that applies pressure so that the hot water in the first circulating water tank 17 does not vaporize.

第２ポンプ１９は、前記第一循環水槽１７からバイオマス燃焼等の熱供給施設２０に熱水Ｈを送るポンプ装置である。 The second pump 19 is a pump device that sends hot water H from the first circulating water tank 17 to a heat supply facility 20 for biomass combustion or the like.

バイオマス燃焼等の熱供給施設２０は、バイオマス燃料等の燃焼ボイラー、ガス化炉、ガスタービン、ガスエンジン、排熱回収ボイラーなどの熱供給施設の総称である。 The heat supply facility 20 for biomass combustion or the like is a general term for heat supply facilities such as a combustion boiler for biomass fuel, a gasifier, a gas turbine, a gas engine, and an exhaust heat recovery boiler.

熱水・蒸気調整器２１は、前記バイオマス燃焼等の熱供給施設２０により加熱された熱水Ｈの温度、圧力を安定させるための再生可能エネルギーを使った熱水Ｈまたは蒸気の調整装置である。 The hot water / steam regulator 21 is a hot water H or steam regulator that uses renewable energy to stabilize the temperature and pressure of the hot water H heated by the heat supply facility 20 such as biomass combustion. ..

複合発電装置２２は、蒸気タービン発電、バイナリー発電等の余剰熱を利用する複合発電の総称である。 The combined power generation device 22 is a general term for combined power generation that utilizes surplus heat such as steam turbine power generation and binary power generation.

復水器２３は、前記バイオマス燃焼等の熱供給施設２０での利用が蒸気の場合、利用後の蒸気を冷却し凝縮して水に戻す装置である。 The condenser 23 is a device that cools, condenses, and returns the steam after use to water when the steam is used in the heat supply facility 20 such as biomass combustion.

増圧器２４は、前記復水器２３で復水となった水を加圧する装置である。 The pressure booster 24 is a device that pressurizes the water restored by the condenser 23.

第二循環水槽２５は、前記地熱交換器１と第一循環水槽１７を循環する熱水Ｈ及び前記バイオマス燃焼等の熱供給施設２０の利用後の熱水Ｈを一旦溜め前記熱水加熱器１５を経て前記地熱交換器１及び前記バイオマス燃焼等の熱供給施設２０に送るための水槽である。 The second circulating water tank 25 temporarily stores the hot water H circulating in the geothermal exchanger 1 and the first circulating water tank 17 and the hot water H after use of the heat supply facility 20 for biomass combustion and the like, and the hot water heater 15. It is a water tank for sending to the geothermal exchanger 1 and the heat supply facility 20 for biomass combustion or the like.

また、前記第一循環水槽１７からの熱水Ｈを、第二ポンプ１９によりバイオマス燃焼等の熱供給施設２０に直接連携し、蒸気利用の場合はさらに高温の蒸気となり熱水・蒸気調整器２１を経由し、蒸気・バイナリー・ＯＲＣ（オーガニックランキンサイクル）等の複合発電装置２２で発電する。その後蒸気は復水器２３で復水になり増圧器２４で増圧され第二循環水槽２５に送られ地熱交換器１と第一循環水槽１７を循環する熱水と混合し、一部の熱水は地熱交換機１に戻され、残りはバイオマス燃焼等の熱供給施設２０に送られ再利用されるという構成を採用することも好適である。 Further, the hot water H from the first circulating water tank 17 is directly linked to the heat supply facility 20 for biomass combustion or the like by the second pump 19, and in the case of steam utilization, the steam becomes higher temperature steam and becomes hot water / steam regulator 21. Power is generated by the combined power generation device 22 such as steam, binary, ORC (organic Rankine cycle), etc. After that, the steam is condensed by the condenser 23, boosted by the pressure booster 24, sent to the second circulating water tank 25, mixed with the hot water circulating in the geothermal exchanger 1 and the first circulating water tank 17, and part of the heat. It is also preferable to adopt a configuration in which the water is returned to the geothermal exchanger 1 and the rest is sent to the heat supply facility 20 for biomass combustion or the like for reuse.

また、前記第一循環水槽１７からの熱水Ｈを、第二ポンプ１９によりバイオマス燃焼等の熱供給施設２０に直接連携し、熱水利用の場合はさらに高温の熱水Ｈとなり、熱水・蒸気調整器２１を経由し、蒸気・バイナリー・ＯＲＣ（オーガニックランキンサイクル）等の複合発電装置２２で発電する。その後熱水Ｈは第二循環水槽２５に送られ地熱交換器１と第一循環水槽１７を循環する熱水Ｈと混合し、一部の熱水Ｈは地熱交換機１に戻され、残りはバイオマス燃焼等の熱供給施設２０に送られ再利用されるという構成を採用することも好適である。 Further, the hot water H from the first circulating water tank 17 is directly linked to the heat supply facility 20 for biomass combustion or the like by the second pump 19, and in the case of using hot water, the hot water H becomes a higher temperature hot water H. Power is generated by a combined power generation device 22 such as steam, binary, ORC (organic Rankine cycle) via the steam regulator 21. After that, the hot water H is sent to the second circulating water tank 25 and mixed with the hot water H circulating in the geothermal exchanger 1 and the first circulating water tank 17, some of the hot water H is returned to the geothermal exchanger 1, and the rest is biomass. It is also preferable to adopt a configuration in which the heat is sent to the heat supply facility 20 for combustion or the like and reused.

また、本発明に係る地熱交換器１を利用した発電システムＳにおいて、バイオマス等の再生可能エネルギーを利用する手段として、その他の火力または再生可能エネルギー発電の余剰電力等と組み合わせる構成を採用することも好適である。 Further, in the power generation system S using the geothermal exchanger 1 according to the present invention, as a means for utilizing renewable energy such as biomass, it is also possible to adopt a configuration in which it is combined with other thermal power or surplus power of renewable energy power generation. Suitable.

図３は、従来の地熱発電に用いられる地熱生産井及び地熱交換器との比較を示す比較説明図であり、図３（ａ）はフラッシュ発電を示し、図３（ｂ）は二重管構造における従来の地熱交換器を示し、図３（ｃ）は本発明にかかる地熱交換器を示している。なお、発電機構自体に関しては図３では省略している。 3A and 3B are comparative explanatory views showing a comparison with a geothermal production well and a geothermal exchanger used for conventional geothermal power generation, FIG. 3A shows flash power generation, and FIG. 3B shows a double pipe structure. 3 (c) shows the geothermal exchanger according to the present invention. The power generation mechanism itself is omitted in FIG.

図３（ａ）に示すとおり、フラッシュ発電では主に２００度以上の地熱高温帯Ｎによる発電に適するものであり、深部熱水若しくは深部熱水から分離した蒸気を利用して直接タービンを回すものである。また、直接タービンを回すもの以外として、比較的に低温地熱帯Ｔでも利用可能な二次媒体を使うバイナリー発電もあるが、熱エネルギーの採取手段の構成としては同様である。なお、このようなフラッシュ発電等では、生産井Ｘと還元井Ｙを分けてボーリングする必要があり、また、セパレーター（気水分離器）を用いて蒸気と熱水に分け、熱水は還元井から地下に戻されるため、熱水の熱エネルギーを有効活用については、熱効率的に問題があるといえる。また、直接地熱流体の蒸気を利用する為、蒸気に含まれる硫黄分などによりスケール生成の問題を含むものといえる。 As shown in FIG. 3A, flash power generation is mainly suitable for power generation in the geothermal high temperature zone N of 200 ° C or higher, and directly rotates a turbine using deep hot water or steam separated from deep hot water. Is. In addition to the one that directly rotates the turbine, there is also binary power generation that uses a secondary medium that can be used even in a relatively low temperature tropical T, but the configuration of the means for extracting thermal energy is the same. In such flash power generation, it is necessary to bore the production well X and the reduction well Y separately, and separate the steam and hot water using a separator (air-water separator), and the hot water is the reduction well. Since it is returned to the basement from the ground, it can be said that there is a problem in terms of thermal efficiency regarding the effective utilization of the thermal energy of hot water. In addition, since the vapor of the geothermal fluid is used directly, it can be said that there is a problem of scale generation due to the sulfur content contained in the vapor.

生産井Ｘは、図３（ａ）に示したフラッシュ発電に用いられ、深部に存在する地熱貯留層までボーリングして地熱流体を直接取り出す管路である。なお、図３（ｂ）に示すとおり、二重管式の地熱交換器は深部から地表までの全工程で地熱の影響を受けるものである。 The production well X is a pipeline used for the flash power generation shown in FIG. 3A, boring to the geothermal reservoir existing in the deep part, and directly taking out the geothermal fluid. As shown in FIG. 3B, the double-tube type geothermal exchanger is affected by geothermal heat in the entire process from the deep part to the ground surface.

還元井Ｙは、セパレーター（気水分離器）により蒸気と熱水に分けられた内の熱水分と蒸気を復水にしたものを地下に戻す管路である。 The reduction well Y is a pipeline that returns the hot water and steam in the steam and hot water separated by a separator (air-water separator) to the underground.

図３（ｂ）は、図３（ａ）に示したフラッシュ発電での問題点を解決すべく開発された熱交換器であり特許文献１から３に示されているような二重管式の循環型地熱交換器である。但し、係る従来型の二重管式の循環型地熱交換器は、全行程に水が充填されることから、地熱エネルギーが全行程の水に及んでしまい、水が下降する際も上昇する際も低温帯も通過するため、地上に到達するときは多くの地熱エネルギーを失ってしまう。従って、約１８０度以下の中低温地熱帯を対象とすることが困難である。 FIG. 3B is a heat exchanger developed to solve the problems in the flash power generation shown in FIG. 3A, and is a double-tube type as shown in Patent Documents 1 to 3. It is a circulating geothermal exchanger. However, in the conventional double-tube circulation type geothermal exchanger, since water is filled in the entire process, the geothermal energy extends to the water in the entire process, and when the water descends and rises. As it passes through low temperature zones, it loses a lot of geothermal energy when it reaches the ground. Therefore, it is difficult to target mid-low temperature tropical tropics below about 180 degrees Celsius.

図３（ｃ）は、本発明に係る地熱交換器１である。上記の図３（ａ）図３（ｂ）に示す従来式の熱交換器と比較して大きく相違する点を以下に説明する。 FIG. 3C is a geothermal exchanger 1 according to the present invention. The points that are significantly different from the conventional heat exchangers shown in FIGS. 3 (a) and 3 (b) will be described below.

本発明に係る地熱交換器１では、約１８０度以下の中低温の地熱帯においても効率よく熱交換を行う事ができ、地熱開発の対象となる場所を増加させ、地熱エネルギー採取量を増やすことを可能とするものである。具体的には、地中において高温の地熱帯から熱水Ｈを取り出す際、低温の地熱帯を通過する領域における温度低下を避けるべく、係る領域については加圧された気体を充填して熱伝導をしにくくするものである。即ち、従来技術では直接蒸気を取り出すか、若しくは水を充満させて地熱からの熱エネルギーを得るものであったため、低温域での熱伝導によるロスを生じるものであった。これに対し、本発明では液体６と気体５という異なる状態を利用している点が大きく異なっている。図３（ｃ）が示すように、ケーシング２内において地熱高温帯Ｎの領域には液体６（クロスハッチングで示す）、地熱低温帯Ｔの領域には気体５（ハッチング無し）というように、液体６と気体５との境界Ｋを水位Ｐの近傍に設けている。また、使用する液体６については基本的に循環するものであるため、液体６の処理効率が良いという長所がある。 The geothermal exchanger 1 according to the present invention can efficiently exchange heat even in the mid-low temperature geotropic of about 180 degrees or less, increase the number of places targeted for geothermal development, and increase the amount of geothermal energy collected. Is possible. Specifically, when hot water H is taken out from the high temperature tropics in the ground, in order to avoid a temperature drop in the region passing through the low temperature tropics, the region is filled with a pressurized gas to conduct heat. It makes it difficult to do. That is, in the prior art, the steam is directly taken out or filled with water to obtain the thermal energy from the geothermal heat, so that a loss due to heat conduction in a low temperature region occurs. On the other hand, the present invention is largely different in that different states of liquid 6 and gas 5 are used. As shown in FIG. 3 (c), in the casing 2, the liquid 6 (indicated by cross-hatching) in the region of the geothermal high temperature zone N, the gas 5 (no hatching) in the region of the geothermal low temperature zone T, and so on. The boundary K between 6 and the gas 5 is provided in the vicinity of the water level P. Further, since the liquid 6 used is basically circulated, there is an advantage that the processing efficiency of the liquid 6 is good.

更に、地熱低温帯Ｔの領域を熱水Ｈが通過する際、該熱水Ｈの温度低下を極力避けるべく、取水管８においては、深部の地熱エネルギーを効率よく取り出すのに必要な内径を備えるとともに、図面には示していないが、流速を高めるために、取水管８の流路を絞るという構成を採用することも有効である。 Further, in order to avoid a temperature drop of the hot water H as much as possible when the hot water H passes through the region of the geothermal low temperature zone T, the intake pipe 8 is provided with an inner diameter necessary for efficiently extracting the geothermal energy in the deep part. At the same time, although not shown in the drawing, it is also effective to adopt a configuration in which the flow path of the intake pipe 8 is narrowed down in order to increase the flow velocity.

図４は、本発明に係る地熱交換器１を利用した発電システムの部分的な構成を説明するための構成説明図であり、図４（ａ）は、特許請求の範囲に記載される請求項３の発電システムの構成例を示し、図４（ｂ）は、請求項４に記載の発電システムの構成例を示している。 FIG. 4 is a configuration explanatory diagram for explaining a partial configuration of a power generation system using the geothermal exchanger 1 according to the present invention, and FIG. 4A is a claim described in the claims. 3 shows a configuration example of the power generation system, and FIG. 4B shows a configuration example of the power generation system according to claim 4.

図４（ａ）に示されるのは、請求項３に係る発明のとおり本発明に係る地熱交換器を利用するとともに、熱水Ｈを循環する装置を含んだ発電システムを示している。具体的には、第一循環水槽１７と、第二循環水槽２５と、熱水加熱器１５と、前記第一循環水槽１７は、半地下に備えられるとともに蒸発を抑えるために加圧する圧力装置１８を備え、前記第二循環水槽２５、前記熱水加熱器１５、及び前記第一ポンプ１６を経由して前記熱水Ｈを循環させる構成を含むものである。なお、発電機構そのものについては、限定されるものではないため、図面には示していないが、火力やバイオマス等の再生可能エネルギーと直接連携を図ることにより、発電総量を増加させることを可能とするものである。 FIG. 4A shows a power generation system including a device for circulating hot water H while using the geothermal exchanger according to the present invention as in the invention according to claim 3. Specifically, the first circulating water tank 17, the second circulating water tank 25, the hot water heater 15, and the first circulating water tank 17 are provided semi-underground and a pressure device 18 that pressurizes to suppress evaporation. The hot water H is circulated via the second circulating water tank 25, the hot water heater 15, and the first pump 16. The power generation mechanism itself is not limited, so it is not shown in the drawings, but it is possible to increase the total amount of power generation by directly coordinating with renewable energies such as thermal power and biomass. It is a thing.

図４（ｂ）には、例えば蒸気タービン式の発電装置へ熱水Ｈ又は熱水Ｈから発生した蒸気を利用する場合において、タービン出口の蒸気を復水器２３で復水とし、増圧器２４、前記第二循環水槽２５、熱水加熱器１５で加熱後、一部の復水は前記第１ポンプ１６を経由し前記地熱交換器１に戻すというものである。そうすることによって、地下の地熱高温帯Ｎ領域を冷やすことが少なくなり、熱交換の高効率を維持できる。さらには、実用期間を長く保つことができることとなる。なお、図４（ｂ）では、熱水Ｈの循環装置の一部を省略している。



In FIG. 4B, for example, when hot water H or steam generated from hot water H is used for a steam turbine type power generation device, the steam at the turbine outlet is condensed by the condenser 23 and the pressure booster 24 is used. After heating in the second circulating water tank 25 and the hot water heater 15, a part of the condensate is returned to the geothermal exchanger 1 via the first pump 16. By doing so, the underground geothermal high temperature zone N region is less likely to be cooled, and high efficiency of heat exchange can be maintained. Furthermore, the practical period can be maintained for a long time. In FIG. 4B, a part of the hot water H circulation device is omitted.

１ 地熱交換器
２ ケーシング管
３ 内管
４ 断熱層
５ 気体
６ 液体
７ 注水管
８ 取水管
９ コンプレッサー
１０ 圧力計
１１ 送風管
１２ 外周セメント
１３ 水位計
１４ 水処理装置
１５ 熱水加熱器
１６ 第一ポンプ
１７ 第一循環水槽
１８ 圧力装置
１９ 第二ポンプ
２０ バイオマス燃焼等の熱供給施設
２１ 熱水・蒸気調整器
２２ 複合発電装置
２３ 復水器
２４ 増圧器
２５ 第二圧力循環水槽
Ｈ 熱水
Ｋ 境界
Ｓ 発電システム
Ｎ 地熱高温帯
Ｔ 地熱低温帯
Ｘ 生産井
Ｙ 還元井
Ｐ 水位




1 Geothermal exchanger 2 Casing pipe 3 Inner pipe 4 Insulation layer 5 Gas 6 Liquid 7 Water injection pipe 8 Intake pipe 9 Compressor 10 Pressure gauge 11 Blower pipe 12 Outer circumference cement 13 Water level gauge 14 Water treatment device 15 Hot water heater 16 First pump 17 1st circulating water tank 18 Pressure device 19 2nd pump 20 Heat supply facility for biomass combustion, etc. 21 Hot water / steam regulator 22 Combined power generation device 23 Water condenser 24 Booster 25 2nd pressure circulating water tank H Hot water K boundary S Power generation system N Geothermal high temperature zone T Geothermal low temperature zone X Production well Y Reduction well P Water level

本発明によれば、約１８０℃以下の中低温の地熱帯において、効率良く熱交換を行うことができ、地熱開発の対象となる場所の数を増やして、地熱エネルギー採取量を増やすことが可能になる。さらに、バイオマス等の再生可能エネルギーと直接連携することにより総発電量を増大する地熱発電システムの効果は大きい。本発明は、従来の地熱発電から見ると今までに考えられない程の膨大な出力増大が望め、バイオマス発電側から見ても単独の発電に比べバイオマス燃料の乾燥や発電過程での地熱エネルギーの基礎熱利用等を得ることで熱効率が向上し全体としてＣＯ ２ の削減に寄与できるという優れた効果を発揮するものである。
According to the present invention, heat exchange can be efficiently performed in the mid-low temperature geotropic of about 180 ° C. or less, the number of places targeted for geothermal development can be increased, and the amount of geothermal energy collected can be increased. become. Furthermore, the geothermal power generation system, which increases the total amount of power generation by directly linking with renewable energy such as biomass, has a great effect. According to the present invention, an enormous increase in output can be expected from the viewpoint of conventional geothermal power generation, and even from the viewpoint of biomass power generation, the drying of biomass fuel and the geothermal energy in the power generation process can be compared with the case of single power generation. By obtaining the utilization of basic heat, etc., the thermal efficiency is improved and the CO 2 can be reduced as a whole, which is an excellent effect.

Claims (6)

地中から熱エネルギーを取り出すための地熱交換器であって、
外側を外周セメント（１２）で密閉して地中に埋設するケーシング管（２）と、
前記ケーシング管（２）との間で空気を入れた断熱層（４）を得るために上部の地熱低温帯（Ｔ）となる領域の一部または全部の内側に設ける内管（３）と、
前記ケーシング管（２）深部の地熱高温帯（Ｎ）に注水する注水管（７）と、
気体（５）と液体（６）の境界（Ｋ）となる水面より下方まで伸ばされた取水管（８）と、
前記ケーシング管（２）内の水位（Ｐ）を監視する水位計（１３）と、
前記ケーシング管（２）内の前記気体（５）をコンプレッサー（９）により加圧するとともに、前記液体を圧送するための送風管（１１）とを備えて前記水位（Ｐ）を維持することを特徴とする地熱交換器（１） It is a geothermal exchanger for extracting heat energy from the ground.
A casing pipe (2) that is buried in the ground with the outside sealed with outer cement (12),
An inner pipe (3) provided inside a part or all of the upper geothermal low temperature zone (T) in order to obtain a heat insulating layer (4) in which air is introduced between the casing pipe (2) and the casing pipe (2).
The casing pipe (2), the water injection pipe (7) for injecting water into the deep geothermal high temperature zone (N), and the water injection pipe (7).
An intake pipe (8) extending below the water surface, which is the boundary (K) between the gas (5) and the liquid (6),
A water level gauge (13) that monitors the water level (P) in the casing pipe (2), and
The gas (5) in the casing pipe (2) is pressurized by a compressor (9), and the water level (P) is maintained by providing a blower pipe (11) for pumping the liquid. Geothermal exchanger (1) 前記取水管（８）が、請求項１に記載の地熱交換器（１）の深部地熱エネルギーを効率よく取水できるのに必要な内径を備えるとともに、該地熱交換器（１）から第一循環水槽までの間の流路を絞ることによって流速を上げることを特徴とする請求項１に記載の地熱交換器（１）。 The water intake pipe (8) has an inner diameter necessary for efficiently taking in the deep geothermal energy of the geothermal exchanger (1) according to claim 1, and the first circulating water tank is provided from the geothermal exchanger (1). The geothermal exchanger (1) according to claim 1, wherein the flow velocity is increased by narrowing the flow path between the two. 前記取水管（８）により前記地熱高温帯（Ｎ）から得た熱水（Ｈ）の圧力と温度を安定させるために熱水（Ｈ）を循環する装置を備え、前記地熱交換器（１）を利用する発電システムであって、
第一循環水槽（１７）と、
第二循環水槽（２５）と、
熱水加熱器（１５）と、
第一ポンプ（１６）とを有し、
前記第一循環水槽（１７）は、半地下に備えられるとともに蒸発を押さえるために加圧する圧力装置（１８）を備え、
前記第二循環水槽（２５）、前記熱水加熱器（１５）、及び前記第一ポンプ（１６）を経由して前記熱水（Ｈ）を循環させる構成を含むことを特徴とする請求項１又は請求項２に記載の地熱交換器（１）を利用する発電システム（Ｓ）。 The geothermal exchanger (1) is provided with a device for circulating the hot water (H) in order to stabilize the pressure and temperature of the hot water (H) obtained from the geothermal high temperature zone (N) by the intake pipe (8). It is a power generation system that uses
First circulation water tank (17) and
Second circulation water tank (25) and
Hot water heater (15) and
It has a first pump (16) and
The first circulating water tank (17) is provided in the semi-underground and is provided with a pressure device (18) that pressurizes to suppress evaporation.
Claim 1 is characterized by comprising a configuration in which the hot water (H) is circulated via the second circulating water tank (25), the hot water heater (15), and the first pump (16). Alternatively, the power generation system (S) using the geothermal exchanger (1) according to claim 2. タービン出口の蒸気を復水器（２３）で復水とし、増圧器（２４）、前記第二循環水槽（２５）、熱水加熱器（１５）で加熱後、一部の復水は前記第１ポンプ（１６）を経由し前記地熱交換器（１）に戻すことで、地下の地熱高温帯（Ｎ）領域を冷やすことが少なく熱交換の高効率を維持でき、さらに実用期間を長く保つことができる構成を含むことを特徴とする請求項１又は請求項２に記載の地熱交換器（１）を利用する発電システム（Ｓ）。 The steam at the turbine outlet is condensed by the condenser (23), heated by the pressure booster (24), the second circulating water tank (25), and the hot water heater (15), and then a part of the condensate is the first. By returning to the geothermal exchanger (1) via 1 pump (16), it is possible to maintain high efficiency of heat exchange without cooling the underground geothermal high temperature zone (N) region, and to maintain a long practical period. The power generation system (S) using the geothermal exchanger (1) according to claim 1 or 2, wherein the power generation system (S) includes a configuration capable of the above. 前記地熱交換器１を利用した発電のためのシステムにおいて、
他の余剰熱供給施設（２０）と直接連携して稼働する構成を含むことを特徴とする請求項３又は請求項４に記載の発電システム（Ｓ）。 In the system for power generation using the geothermal exchanger 1.
The power generation system (S) according to claim 3 or 4, wherein the power generation system (S) includes a configuration that operates in direct cooperation with another surplus heat supply facility (20). 前記地熱交換器（１）を利用した発電のためのシステムにおいて、
他の発電装置からの余剰電力を組み合わせて稼働する構成を含むことを特徴とする請求項３から請求項５の何れかに記載の発電システム（Ｓ）。

In the system for power generation using the geothermal exchanger (1),
The power generation system (S) according to any one of claims 3 to 5, wherein the power generation system (S) includes a configuration in which surplus power from another power generation device is combined to operate.
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